Sierra Classic 2500 4WD V8-6.0L (2007)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor Replacement - Bank 1 Sensor 2
HEATED OXYGEN SENSOR REPLACEMENT - BANK 1 SENSOR 2
REMOVAL PROCEDURE
1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
2. If equipped, disconnect the fuel composition sensor electrical connector.
3. Disconnect the connector position assurance (CPA) retainer.
NOTE: Refer to Heated Oxygen and Oxygen Sensor Notice.
4. If equipped with a fuel composition sensor, remove the heated oxygen sensor (HO2S) electrical connector from the fuel line clip.
5. If equipped with a 4.8L or 5.3L engine, disconnect the HO2S electrical connector (2).
6. If equipped with a 6.0L engine, disconnect the HO2S electrical connector (2).
7. Remove the HO2S.
INSTALLATION PROCEDURE
IMPORTANT: A special anti-seize compound is used on the HO2S threads. The compound consists of liquid graphite and glass beads. The
graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already
have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be
reinstalled, the threads must have anti-seize compound applied before the reinstallation.
